Question: A 4 2 0 - loop circular armature coil with a diameter of 7 . 0 cm rotates at 1 3 0 rev / s

A 420-loop circular armature coil with a diameter of 7.0 cm rotates at 130 rev/s in a uniform magnetic field of strength 0.35 T . What is the rms voltage output of the generator? What would you do to the rotation frequency in order to double the rms voltage output?

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